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The design for the Vivaldi antenna is motivated by the need for a broadband measurement antenna for an antenna test range (ATR). The ATR is capable of a dual axis rotation to create 3-D plots and to calculate the total radiated power (TRP). 1 The TRP calculation involves the...

In the new millennium, the explosion of info-communication technologies has brought many new broadband design challenges. To meet these challenges, designers are required to fulfill more functionality per unit volume. In the first part of this article, the basic PBG configurations and application of PBG structures in enhancing the...

Low temperature co-fired ceramic (LTCC) is an increasingly popular technology that has the potential for increased reliability, improved electrical performance, size reduction and reduced cost. The LTCC process allows passive components such as resistors, inductors and capacitors to be embedded in a multilayer, integrated module with high density and...

The direct conversion, all digital gain control (DC-ADGC) radio receiver employs logarithmic amplifiers in the analog baseband to compress the signal dynamic range before the analog-to-digital converter. An antilog function may then be used in the digital baseband to decompress the signal. Two implementations of the DC-ADGC receiver are...

The direct transponding of RF signals onto optical fiber is an important element in the implementation of efficient radio-over-fiber systems. MQW lasers exhibit transfer functions from RF to light, which generally offer good linearity, but adequate dynamic range for applications in cellular and cordless systems requires further improvement in...

W-CDMA is one of the most important requirements of 3G mobile communication systems,1 and it presents a challenge to the design of RF systems for W-CDMA mobile terminals. Compared with a conventional superheterodyne structure, the direct RF I/Q modulation shows the advantages of a simple circuit configuration and low...

European Microwave Week has become the focal point in the microwave industry calendar, when the community convenes to debate and discuss the state of the commercial climate and the strength and depth of global activity. The key questions being: What are the technological advancements coming to the fore? What...

The RAI Centre in Amsterdam during the second week of October should show up bright and clear on the radar of all those working in the microwaves and RF, semiconductors and wireless technology fields. That is because the 7th European Microwave Week will not only feature the three established...

Amsterdam is a city that needs no introduction. The same is becoming true of European Microwave Week, which will celebrate its 7th year during the week of 11–15 October 2004 at the RAI Centre, home of the inaugural event in 1998. Since then, it has developed and matured into...

There is one thing that distinguishes Amsterdam from many other, great capitals of the world — its ability to blend history with modern day living. While well known as a centre for business, art and culture, the city is still characteristically Dutch. The capital of the Netherlands has made...